syzkaller login: [ 98.397947] BUG: Bad rss-counter state mm:00000000ba152297 type:MM_FILEPAGES val:33 [ 98.398498] BUG: Bad rss-counter state mm:00000000ba152297 type:MM_ANONPAGES val:22 [ 98.505283] ================================================================== [ 98.505803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 98.506326] Read of size 8 at addr ffff88800ea6a880 by task sshd/220 [ 98.506754] [ 98.506877] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 98.507441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 98.507985] Call Trace: [ 98.508163] [ 98.508321] dump_stack_lvl+0x91/0xf0 [ 98.508594] print_report+0xcc/0x620 [ 98.508871] ? __virt_addr_valid+0x102/0x340 [ 98.509177] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.509536] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.509881] kasan_report+0xbe/0xf0 [ 98.510147] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.510564] vma_interval_tree_remove+0xc75/0xec0 [ 98.510901] vma_prepare+0xc54/0x11a0 [ 98.511168] __split_vma+0x5af/0x950 [ 98.511432] ? __pfx___split_vma+0x10/0x10 [ 98.511724] ? find_held_lock+0x2c/0x110 [ 98.512014] do_vmi_align_munmap+0x2ba/0x11f0 [ 98.512330] ? lock_is_held_type+0x9f/0x120 [ 98.512628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 98.512963] ? mtree_range_walk+0x632/0x900 [ 98.513273] ? mas_walk+0x5c7/0x7c0 [ 98.513540] do_vmi_munmap+0x1f1/0x2b0 [ 98.513815] mmap_region+0x1f9/0x2660 [ 98.514084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 98.514366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 98.514764] ? __pfx_lock_acquire+0x10/0x10 [ 98.515066] ? __pfx_mmap_region+0x10/0x10 [ 98.515363] ? security_mmap_addr+0x7d/0xa0 [ 98.515653] ? get_unmapped_area+0x1f5/0x3f0 [ 98.515958] do_mmap+0x854/0xf00 [ 98.516212] vm_mmap_pgoff+0x1a6/0x3a0 [ 98.516487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 98.516802] ksys_mmap_pgoff+0x3af/0x500 [ 98.517094] do_syscall_64+0x3f/0x90 [ 98.517356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.517735] RIP: 0033:0x7fb2f1209d82 [ 98.517986] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 98.519153] RSP: 002b:00007ffd7d8137f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 98.519645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2f1209d82 [ 98.520115] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2f0643000 [ 98.520587] RBP: 00007fb2f0643000 R08: 0000000000000009 R09: 0000000000001000 [ 98.521059] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654ed1d0f70 [ 98.521529] R13: 00007ffd7d813810 R14: 00007ffd7d813840 R15: 00007ffd7d813ba0 [ 98.522006] [ 98.522168] [ 98.522284] Allocated by task 213: [ 98.522519] kasan_save_stack+0x22/0x50 [ 98.522802] kasan_set_track+0x25/0x30 [ 98.523077] __kasan_slab_alloc+0x59/0x70 [ 98.523366] kmem_cache_alloc+0x16b/0x370 [ 98.523645] vm_area_dup+0x20/0x160 [ 98.523897] __split_vma+0x170/0x950 [ 98.524149] split_vma+0xc6/0x110 [ 98.524388] mprotect_fixup+0x8d2/0xb30 [ 98.524664] do_mprotect_pkey+0x87e/0xd40 [ 98.524951] __x64_sys_mprotect+0x78/0xc0 [ 98.525234] do_syscall_64+0x3f/0x90 [ 98.525500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.525858] [ 98.525975] Freed by task 213: [ 98.526189] kasan_save_stack+0x22/0x50 [ 98.526462] kasan_set_track+0x25/0x30 [ 98.526734] kasan_save_free_info+0x2b/0x50 [ 98.527023] __kasan_slab_free+0x10a/0x190 [ 98.527311] kmem_cache_free+0x10d/0x4d0 [ 98.527584] rcu_core+0x8c8/0x2860 [ 98.527829] __do_softirq+0x1b7/0x7d4 [ 98.528089] [ 98.528206] Last potentially related work creation: [ 98.528526] kasan_save_stack+0x22/0x50 [ 98.528802] __kasan_record_aux_stack+0x8e/0xa0 [ 98.529119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 98.529472] remove_vma+0x139/0x170 [ 98.529722] do_vmi_align_munmap+0xd4a/0x11f0 [ 98.530022] do_vmi_munmap+0x1f1/0x2b0 [ 98.530285] __vm_munmap+0x138/0x3a0 [ 98.530548] __x64_sys_munmap+0x59/0x80 [ 98.530819] do_syscall_64+0x3f/0x90 [ 98.531079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.531433] [ 98.531551] Second to last potentially related work creation: [ 98.531927] kasan_save_stack+0x22/0x50 [ 98.532205] __kasan_record_aux_stack+0x8e/0xa0 [ 98.532515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 98.532866] remove_vma+0x139/0x170 [ 98.533113] do_vmi_align_munmap+0xd4a/0x11f0 [ 98.533427] do_vmi_munmap+0x1f1/0x2b0 [ 98.533694] mmap_region+0x1f9/0x2660 [ 98.533956] do_mmap+0x854/0xf00 [ 98.534195] vm_mmap_pgoff+0x1a6/0x3a0 [ 98.534463] ksys_mmap_pgoff+0x3af/0x500 [ 98.534740] do_syscall_64+0x3f/0x90 [ 98.534998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.535357] [ 98.535476] The buggy address belongs to the object at ffff88800ea6a828 [ 98.535476] which belongs to the cache vm_area_struct of size 168 [ 98.536280] The buggy address is located 88 bytes inside of [ 98.536280] freed 168-byte region [ffff88800ea6a828, ffff88800ea6a8d0) [ 98.537050] [ 98.537169] The buggy address belongs to the physical page: [ 98.537543] page:000000008220f9a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea6a [ 98.538140] memcg:ffff88800e694b01 [ 98.538373] flags: 0x100000000000200(slab|node=0|zone=1) [ 98.538729] page_type: 0xffffffff() [ 98.538979] raw: 0100000000000200 ffff88800879fc80 ffffea0000260980 dead000000000006 [ 98.539478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e694b01 [ 98.539983] page dumped because: kasan: bad access detected [ 98.540341] [ 98.540457] Memory state around the buggy address: [ 98.540776] ffff88800ea6a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 98.541247] ffff88800ea6a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 98.541722] >ffff88800ea6a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 98.542195] ^ [ 98.542423] ffff88800ea6a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 98.542896] ffff88800ea6a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 98.543367] ================================================================== [ 98.544002] Disabling lock debugging due to kernel taint [ 100.460087] BUG: Bad rss-counter state mm:000000001cbeec11 type:MM_FILEPAGES val:33 [ 100.461346] BUG: Bad rss-counter state mm:000000001cbeec11 type:MM_ANONPAGES val:22 [ 100.949623] BUG: Bad rss-counter state mm:00000000c947c004 type:MM_FILEPAGES val:33 [ 100.950751] BUG: Bad rss-counter state mm:00000000c947c004 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9535' (ECDSA) to the list of known hosts. 2023/06/19 23:32:49 fuzzer started 2023/06/19 23:32:49 dialing manager at localhost:44161 2023/06/19 23:32:49 checking machine... 2023/06/19 23:32:49 checking revisions... [ 101.690145] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:32:49 testing simple program... [ 101.747622] cgroup: Unknown subsys name 'net' [ 101.786004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:31:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7777bf3f88 CR3=0000000016098000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2038343a32333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a32333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864a875d RBX=0000000000000001 RCX=ffffffff864a8758 RDX=0000000000000000 RSI=0000000000000005 RDI=ffffffff860480c4 RBP=ffff888015b36ff0 RSP=ffff888015b36f28 R8 =ffffffff864a8734 R9 =ffff888015b36fd8 R10=0000000000038001 R11=00000000000b3b3c R12=ffff888015b36ff8 R13=ffff888015b36fe0 R14=ffff888015b36fd9 R15=ffff888015b36f98 RIP=ffffffff81130a6e RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbc0e6ec900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055bb77650c28 CR3=0000000016018000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000